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 Tricky sudoku (Posted on 2006-06-05)
A new version of Sudoku Puzzle.

In this version, like in a normal sudoku, numbers 1 to 9 appears only once in every row or column. But in the nine 3 X 3 subblocks any number, instead of appearing only once, appears either once or twice or not at all. In each subblock, three numbers appears once, three numbers appears twice & three numbers do not appear at all.

Considering this rule solve the sudoku puzzle given below.

```+---+---+---++---+---+---++---+---+---+
| 1 |   | 6 ||   | 7 |   || 2 |   | 8 |
+---+---+---++---+---+---++---+---+---+
|   | 1 |   || 7 |   | 2 ||   | 9 | 3 |
+---+---+---++---+---+---++---+---+---+
|   | 7 |   ||   |   | 4 ||   |   |   |
+===+===+===++===+===+===++===+===+===+
|   | 8 | 9 || 1 |   | 6 ||   |   | 2 |
+---+---+---++---+---+---++---+---+---+
| 5 |   |   || 3 |   |   ||   | 1 |   |
+---+---+---++---+---+---++---+---+---+
| 8 |   | 3 ||   |   | 7 ||   |   | 9 |
+===+===+===++===+===+===++===+===+===+
|   | 6 |   ||   | 9 |   || 8 | 3 |   |
+---+---+---++---+---+---++---+---+---+
| 2 |   | 1 ||   |   | 5 ||   |   | 7 |
+---+---+---++---+---+---++---+---+---+
| 9 |   |   || 8 |   | 3 ||   |   | 4 |
+---+---+---++---+---+---++---+---+---+
```

 Submitted by Salil Rating: 4.1667 (6 votes) Solution: (Hide) ```+---+---+---+---+---+---+---+---+---+ | 1 | 3 | 6 | 5 | 7 | 9 | 2 | 4 | 8 | +---+---+---+---+---+---+---+---+---+ | 6 | 1 | 8 | 7 | 5 | 2 | 4 | 9 | 3 | +---+---+---+---+---+---+---+---+---+ | 3 | 7 | 5 | 6 | 2 | 4 | 9 | 8 | 1 | +---+---+---+---+---+---+---+---+---+ | 4 | 8 | 9 | 1 | 3 | 6 | 5 | 7 | 2 | +---+---+---+---+---+---+---+---+---+ | 5 | 9 | 2 | 3 | 4 | 8 | 7 | 1 | 6 | +---+---+---+---+---+---+---+---+---+ | 8 | 5 | 3 | 4 | 6 | 7 | 1 | 2 | 9 | +---+---+---+---+---+---+---+---+---+ | 7 | 6 | 4 | 2 | 9 | 1 | 8 | 3 | 5 | +---+---+---+---+---+---+---+---+---+ | 2 | 4 | 1 | 9 | 8 | 5 | 3 | 6 | 7 | +---+---+---+---+---+---+---+---+---+ | 9 | 2 | 7 | 8 | 1 | 3 | 6 | 5 | 4 | +---+---+---+---+---+---+---+---+---+ ```

 Subject Author Date Solution K Sengupta 2009-01-23 12:22:25 re: No Subject Uwe 2006-10-05 05:24:21 No Subject Uwe 2006-10-05 05:22:38 Tricky? Ha! Robert 2006-06-13 16:14:10 Tricky? Ha! Robert 2006-06-13 16:11:33 Looks interesting Josie Faulkner 2006-06-05 18:56:16 Answer Eric 2006-06-05 13:05:36

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